When talking about her upcoming duet with Rihanna multi-tasker Katy Perry managed to throw a little shade Beyoncé and Shakira's way — and when I say " a little" I mean a lot — by viciously attacking their "Beautiful Liar" duet. "We've collaborated on a lot of things, but just not songs yet. It's one of those things that's got so much build up that we have to deliver," she said of her plans with Rihanna before moving in for the kill. "I want it to be like that Eurythmics and Aretha Franklin song 'Sisters Are Doin' It For Themselves,' not 'Beautiful Liar.' How disappointed would you be if that song came out and it's no good? Sometimes you have to wait for greatness." Nothing like a bit of casual yet oh-so direct bitchery. [US]
I'm kind of liking the new-and-improved Katy and her big mouth, the singer crashing a bachelorette party in London and telling the bride-to-be not to get married. [NYDN]

You know how they say that women are programmed to forget the horrors of childbirth so that they'll continued to procreate? Well, Reese Witherspoon has a similar blind spot for the terrible twos because word has it that she's pregnant with her third child. Joining siblings Ava and Deacon, it's her first kid with husband Jim Toth. "Reese is right around 12 weeks. "[She's] not planning to announce it," said a source type, adding that she's already told friends – including one with a big mouth and links to US Weekly editorial staff. "The timing is right. She's so happy!" [US]

This one sounds like a complete load of codswallop but it's so ridiculous it's worth a read: Gwyneth Paltrow and Kate Moss allegedly got into a Mean Girls-issue spat in Mexico at pal Sir Philip Green's 60th birthday party. "Gwyneth had gone for a jog on the beach before the big birthday bash. Kate was out for a walk, eating crisps, when Gwyneth ran past," said a rather creative source type. "Kate said, 'Oi, what you out jogging for?' Gwyneth fired back, 'So I don't look like you when I get old'. Kate was speechless for a second then spat back and threw some crisps at her. She said, 'Why don't you eat some fucking carbs!'" Food fight! P.s. Gwyn is 39 and Kate is 38. [The Sun]

It's hands-down awesome and creepy at the same time that Johnny Depp has decided to book Marilyn Manson to play at his son Jack's 10th birthday party as payment for appearing as a guest vocalist on a "You're So Vain" cover for the perpetual emo's new album. "We did a cover version together of a song which we thought was ironic for each other," said Marilyn. "Johnny played the drums and lead guitar and I played guitar and sang. [The Sun]

Organisers at last night's Barack Obama fundraiser were facepalming all over the shop after Robert De Niro got a little racial when introducing Michelle. "Callista Gingrich. Karen Santorum. Ann Romney," he said. "Now do you really think our country is ready for a white first lady?" FLOTUS's press secretary, Olivia Alair called the joke "inappropriate" and De Niro was quick to offer an apology: "My remarks, although spoken with satirical jest, were not meant to offend or embarrass anyone, especially the first lady." [E!]

It appears that Dianna Agron is in a sexy triangle between Tim Tebow and actor Sebastian Stan, who she's dated on and off for the past year. Though it's not as hot as it sounds: Tim would like to get married and pop his cherry in the vicinity of her person but Diana is playing it cool for now. [Page Six]

Harry Potter bit-part actor Jamie Waylett has been sentenced to two years jail for wisely following up a drug possession charge with a little London riot action. [NYDN]

For a second there we thought the paps had forgotten about Suri Cruise but apparently she's still relevant because they've snapped some incredibly important shots of her jumping over puddles. [E!]

Blurgh, casting agents have put the bullet in my excitement for the next season of American Horror Story by adding Adam Levine to the mix. [E!]

Move over Jennie Garth and Peter Facinelli, The Artist's Penelope Ann Miller is divorcing her husband of 12 years. [E!]

The Situation's rep has said that the TV "star" isn't in rehab, but is instead "at an undisclosed location" for some much needed rest and relaxation. [E!]

Kathy Bates had ovarian cancer? Girl is good at keeping secrets. [People]

Concerned that her giant baby may obliterate her vagina, Jessica Simpson rightfully asks that we pray for her. [US]

You can talk to Dina Lohan on the phone for $18/minute? Worth every penny. [TMZ]

Hugh Hefner's son Marston will be hitting the books – as opposed to women – after he was sentenced to a 52-week domestic violence program for assaulting his Playmate girlfriend Claire Sinclair. [TMZ]

It looks like we'll be seeing a bit more of Carrie Brownstein and Fred Armisen around the traps because Portlandia just got picked up for a third season. [Vulture]

It's time to crack out the plum champagne, Kim Zolciak is pregnant with baby number two. [Radar]

Denying rumors she's sexing on Kanye West, Kim Kardashian says she can't be because she might still be married. Though she's, like, not entirely sure. [Radar]

Prominent sex fantasy protagonist Jon Hamm should have known that talking about how much of an asshat Kim Kardashian is would translate into more column inches (hi!) so he's now trying to avoid all talk of it. "I've come to the realization that WarGames had it correct in 1983," he said. "The only way to win is not to play. So that's all I've got to say about that now." [NYDN]

Want to see stills from the premiere episode of the new Mad Men season to restock the spank-bank image library? Well, Jon doesn't feature in them but maybe you'll see something else you like. Right this way … [E!]